The story
* As a German surname, an Alemannic German variant of Reiser. * Also as a habitational German surname, from the town Ries in Passau. * Also as a Swiss German surname, variant of Rüsser, Rüser, themselves variants of Reusser. * Also as a German surname, variant of Riesser, from the place Donau-Ries in Bavaria.
Etymology from Wiktionary, CC BY-SA 4.0.